Seat primarily for a child



FIG. 1 is a front perspective view of a new and ornamental design for a seat primarily for a child;

FIG. 2 is a rear perspective view of the device shown in FIG. 1;

FIG. 3 is a top plan view of the device shown in FIG. 1;

FIG. 4 is a right side plan view of the device shown in FIG. 1; and,

FIG. 5 is a bottom plan view of the device shown in FIG. 1. 

The ornamental design for a seat primarily for a child, as shown and described. 